合理小煤柱尺寸的确定及分析

Analysis and determination of rational size of small coal pillar

以麻家梁矿4号煤层14100工作面为工程背景,采用理论计算方法,得出合理留设小煤柱宽度,并运用FLAC3D软件建立数值模拟模型,对不同煤柱宽度进行论证,对巷道在回采期间和掘进期间的应力变化规律进行分析研究,得出适应于工程实际的煤柱宽度为7 m。

Taking 14100 working face in No.4 coal seam of Majialiang Mine as engineering background, theoretical calculation method was used to get rational width of setting small coal pillar. At the same time, FLAC3D software was adopted to establish numerical simulation model to demonstrate width of different coal pillars. Stress variation law of roadway during mining and advancing period was analyzed and studied, which obtained that appropriate width of coal pillar adapted to engineering practice was 7m.